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Trailing Knife Cutter for CNC Router

Discussion in 'General Talk Forum' started by Bruceaust, Mar 28, 2012.

  1. Bruceaust

    Bruceaust New Member

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    Hi,
    Here are some pics of the trailing knife vinyl cutter I made for my machine.
    I sourced the cutter head and blades for ebay.
    It is really easy to do. I just used a length of Al. tube with a Roland cutter head inserted into one end. There is an "O ring" at the other end to act as a stopper. A small weight is inserted into the top end of the tube to give the "correct' amount of downward pressure to the knife. The tube slides up and down in teflon bushings as shown. When not in use I just slip the "O ring" off and slide the tube out of the bushings.

    To use , just set the Z height so that the cutter rests on the cutting surface with the weight applied by the small weight at the top of the tube. (a few millimeters of gap under the "O ring")

    Works great, I have cut out many vinyl signs as per the one shown.
    I use a mist of 77 adhesive on the back of the vinyl to hold it flat on the cutting bed.

    Enjoy!! :doubleup:









    Attached files [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG]
     
  2. rcav8r

    rcav8r Moderator Staff Member

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    That's pretty slick..
     
  3. kram242

    kram242 Administrator Staff Member

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    Nice job Bruceaust and it looks like it works great! :good:
    How do you hold the vinyl sheets down to the work piece?
    Mark and Trish
     
  4. Tweakie

    Tweakie Member

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    Excellent job Bruce. :doubleup:

    Tweakie.
     
  5. Bruceaust

    Bruceaust New Member

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    Hi Mark,
    I usually put a piece of clean MDF on the bed and spray a mist of 3M77 or similar glue just to give it a tack to hold it to the MDF

    Bruce
     
  6. kram242

    kram242 Administrator Staff Member

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    I see, looks like it works great.
    Thank you Bruce
    Mark and Trish
     
  7. TigerPilot

    TigerPilot Well-Known Member

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    Bruceaust, you da man!!! That was fast! Just last night I asked you to post it and you came through in an instant. THANKS!!! :banger: :banger:

    It is a simple solution and could be made for the PP 3 with no big mods and like you did the router could stay on the printer. Great solution.
     
  8. Bruceaust

    Bruceaust New Member

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    Also, Instead of putting 77 on the sheet you are cutting if you spray the mdf with the glue, it becomes tacky enough to hold the sheets in place. There are probably other adhesives in the Art line of products that give a removeable bond. I just thought :eek: you could use "frisk film" glued to the mdf!
     
  9. kram242

    kram242 Administrator Staff Member

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    You know looking at this makes me think. We could have an attachment that has the spindle in the center, a knife on one side and the sharpie on the other!
    Mark and Trish
     
  10. Tweakie

    Tweakie Member

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    A Multi-Tasking MK IV :D

    Tweakie.
     
  11. kram242

    kram242 Administrator Staff Member

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    :doubleup: Tweakie, now all we need is a self-contained small low cost laser diode system for the final attachment! :spiteful:
     
  12. Clr2cont

    Clr2cont New Member

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    Bruceaust,
    What software are you using to control you CNC? Does it have drag knife comenstation for blade offset? Or you are using some type of work around?


    Thanks

    Joe
     
  13. markenneth

    markenneth New Member

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    looks interesting and useful

    __________________________
    "a man of courage never need becker knife and tool weapons, but may need bail."
     
  14. kram242

    kram242 Administrator Staff Member

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    What about using one of these bad boyz!
    ***Warning turn volume down this sound is horrible
     

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